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Question 30432
JEE Physics · Medium

Work, Power and Energy: Kinetic Energy Change MCQ

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Kinetic Energy ChangeMediumQuestion 30432

Question

A 4 kg object accelerates from 2 m/s to 5 m/s. Work done by net force is:
  1. A
    6 J
  2. B
    42 J
    Correct
  3. C
    24 J
  4. D
    50 J

Correct answer

42 J

Explanation

W = ΔKE = ½×4×(25−4) = ½×4×21 = 42 J.

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